The answer would be either the time my 100+kg (~220+lbs) friend decided to jump on my shoulders and push downward while I was wearing dodgey gripping shoes (Converse) on wet grass. My legs slipped out from underneath me and I fell straight on my arse. I dislocated two vertebrae, and he had to carry me to the school bus. When I got home I couldn't stand due to pain from moving my back and my dad took me to hospital, my x-ray slides were (I don't know if they still are) used by a local university for their nursing and medical students to give an example of vertebrae dislocation with no damage to the spinal nerve.
Also, when I tore every ligament in my ankle. Literally all of them. Couldn't walk for about 9 months.
Also, when I tore every ligament in my ankle. Literally all of them. Couldn't walk for about 9 months.